# DRG
[![Code Climate](https://codeclimate.com/github/ridiculous/drg/badges/gpa.svg)](https://codeclimate.com/github/ridiculous/drg)
[![Gem Version](https://badge.fury.io/rb/drg.svg)](http://badge.fury.io/rb/drg)

A Ruby utility to help automate dependency management using Bundler. You can pin Gem versions to the current or the next
available level.

## Requirements

* Bundler 1.10+

## Installation

```ruby
gem 'drg'
```

## Tasks

```bash
rake drg:pin
rake drg:pin:major
rake drg:pin:minor
rake drg:pin:patch
rake drg:pin:latest
rake drg:pin:patch_latest
rake drg:pin:minor_latest
rake drg:unpin
```

### drg:pin

DRG really wants to help you manage your project's gems. But DRG doesn't want to replace Bundler. Instead, we want to build on
it. Pinning ignores gems that are fetched from somewhere other than rubygems. For example, gems listed with `:git`, `:github`,
or `:path` will be ignored. You can "pin" all your versions to the current version listed in the Gemfile.lock:

```bash
rake drg:pin
```

This task will update your Gemfile with the gem's full version. It'll change:

```ruby
gem 'rails'
gem 'byebug', require: false
gem 'therubyracer', '~> 0.12', platforms: :ruby
gem 'drg' # need this
```

to:

```ruby
gem 'rails', '4.2.3'
gem 'byebug', '5.0.0', require: false
gem 'therubyracer', '0.12.2', platforms: :ruby
gem 'drg', '0.4.1' # need this
```

### drg:pin:minor

Want to pin gems at their __minor__ version?

```bash
rake drg:pin:minor
```

This task will update your Gemfile with the approximate gem's minor version. It'll change:

```ruby
gem 'rails', '4.2.3'
```

to:

```ruby
gem 'rails', '~> 4.2'
```

### drg:pin:patch

Want to pin gems at their __patch__ version?

```bash
rake drg:pin:patch
```

This task will update your Gemfile with the approximate gem's patch version. It'll change:

```ruby
gem 'rails', '4.2.3'
```

to 

```ruby
gem 'rails', '~> 4.2.3'
```

This can be combined with `bundle update` to quickly update all gems to the latest version.

### drg:pin:major

Pins your gems at the major level:

 ```bash
 rake drg:pin:major
 ```

### drg:pin:latest

Updates each outdated gem to the latest available version:

 ```bash
 rake drg:pin:latest         #=> updates all gems in the Gemfile
 rake drg:pin:latest[<gem>]  #=> updates only the specified <gem>
 ```

### drg:pin:patch_latest

Updates the patch version for each outdated gem to the latest version:

 ```bash
 rake drg:pin:patch_latest         #=> updates all gems in the Gemfile
 rake drg:pin:patch_latest[<gem>]  #=> updates only the specified <gem>
 ```

### drg:pin:minor_latest

Same as `patch_latest` except it updates the minor version to the latest

 ```bash
 rake drg:pin:minor_latest         #=> updates all gems in the Gemfile
 rake drg:pin:minor_latest[<gem>]  #=> updates only the specified <gem>
 ```

### drg:unpin

Remove the versions from your Gemfile. A clean start!

```bash
rake drg:unpin
```

### Automation

I use the following bash script to update all gems to the latest [major|minor|patch] version, run all tests and then add
the result if the specs pass or rollback the changes if they fail.

```bash
#!/bin/bash
git add Gemfile
for cmd in $@; do
	echo "  * Updating $cmd versions"
	bundle exec rake drg:pin:${cmd}_latest
	bundle update
	bundle exec rspec . -t ~js
	if [ $? -eq 0 ]
	then
		echo "  * Tests passed after updating $cmd versions. Adding Gemfile ..."
		git add Gemfile*
	else
		echo "  * Tests failed after updating $cmd versions. Reverting change to Gemfile ..." >&2
		git checkout -- Gemfile*
		bundle
		exit 1
	fi
done
```

### Skipping gems

You can tell drg to ignore gems by adding an inline comment with @drg (skip|ignore|frozen)

```ruby
gem 'name' # @drg skip
```

## Changes

Looking for `drg:spec` that does RSpec scaffolding? It's been moved to it's own gem: [rspec-scaffold](https://github.com/ridiculous/rspec-scaffold)  

## Development

After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake` to run the tests. 
You can also run `bin/console` for an interactive prompt that will allow you to experiment.

## Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/ridiculous/drg.